Which equipment is commonly used to apply a uniform seed coating?

• A. A seed treater such as a rotary drum or inline coater.
• B. A conventional irrigation sprayer.
• C. A hand brush.
• D. A coffee grinder.

Answer: (A)

Uniform seed coating is achieved when seeds are kept in motion and coated material is applied in a controlled, even way. A seed treater like a rotary drum or inline coater does exactly that: seeds tumble or circulate inside the drum while the coating is sprayed or dusted onto them, ensuring each seed receives roughly the same amount. This setup provides consistent coverage, minimizes clumping, and allows precise control of dosing, residence time, and sometimes temperature—all essential for a reliable seed treatment.

Other options don’t fit the purpose as well. A conventional irrigation sprayer is designed for applying liquids to plants or soil in the field, not for bulk seed coating with uniform, controlled distribution. A hand brush can only cover a tiny amount at a time and leads to highly variable results. A coffee grinder isn’t intended for coating seeds at all.